hg: build-infra/jdk9: Fix dependency for missing included files so it does not terminate compilation.

[Magnus Ihse Bursie]

On 2015-01-12 13:50, Erik Joelsson wrote:
> Perhaps the sed expressions should be assigned to a variable, like the 
> WINDOWS_SHOWINCLUDE_SED_PATTERN, to avoid duplication?

Yeah, probably. I'd like to consider this a prototype that might need 
some time maturing before I'm fully prepared to trust it anyway.

It currently also does not work when compiling assembly code on Solaris. 
I have a fix pending for that.

/Magnus